A Magnetorheological Energy Absorber for Enhanced Crashworthiness in Drop-Induced Impacts

dc.contributor.advisorWereley, Norman Men_US
dc.contributor.authorPierce, Rebeccaen_US
dc.contributor.departmentAerospace Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-02-06T06:33:57Z
dc.date.available2020-02-06T06:33:57Z
dc.date.issued2019en_US
dc.description.abstractThis thesis uses a multidisciplinary approach to investigate the enhanced crashworthiness of a magnetorheological energy absorber (MREA). Magnetorheological (MR) fluids have been considered for use in crashworthiness applications because they can be modified to adjust for parameters such as an occupant’s weight or the impact velocity of a crash. This study first reviews an existing soft landing control algorithm for an MREA vertically stroking crew seat and applies it to several crash scenarios. The combined addition of a bumper and optimized yield force is found to successfully reduce the jerk at the end of the MREA stroke without introducing new discontinuities in the acceleration profile. Secondly, this study explores the use of mesocarbon microbeads (MCMBs) in MR fluids. The MCMBs are found to increase the yield force produced in an MR damper. An endurance study further reveals the durability of the yield force-enhancing effect up to 100,000 cycles.en_US
dc.identifierhttps://doi.org/10.13016/kwfg-7yxr
dc.identifier.urihttp://hdl.handle.net/1903/25522
dc.language.isoenen_US
dc.subject.pqcontrolledAerospace engineeringen_US
dc.subject.pquncontrolledcrashworthinessen_US
dc.subject.pquncontrolledmagnetorheological fluiden_US
dc.titleA Magnetorheological Energy Absorber for Enhanced Crashworthiness in Drop-Induced Impactsen_US
dc.typeThesisen_US

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